I was thinking about this the other day, and I realized I have quite a few film series/trilogies in my BD/HD collection:

Bourne Trilogy (HD)
Chronicles of Riddick Franchise (HD)
Infernal Affairs Trilogy (BD)
The Matrix Trilogy (HD)
Mission Impossible Trilogy (HD)
National Treasure I and II (BD)
Pirates of the Caribbean Trilogy (BD)
Resident Evil Trilogy (BD)
Spider-Man Trilogy (BD)

5 of the above film series I already own on SD DVD, but I couldn't resist getting the BD/HD versions either because it was free, really cheap, or the PQ just couldn't be passed up. I guess the only other film series I'm missing on BD or HD would be the Die Hard and Ocean's films (the former of which I'm waiting for a lower price point on and the latter of which I'm not terribly interested in, especially with the schizophrenic PQ for the films).

Just curious to know how many film series the rest of you have on BD and HD, and how many of them you already own on SD DVD?

Bourne

None

Bourne, MI, and eventually PotC.

Dirty Harry
Bourne
Resident Evil
Alien Vs. Predator
Saw
Hostel
Pirates Of The Caribbean
Spider-Man
Terminator
Underworld

Infernal Affairs Trilogy (BD)
Spider-Man Trilogy (BD)
Pirates of the Caribbean Trilogy (BD)
Harry Potter (BD)
That's Entertainment
28 Days Later / 28 Weeks Later (BD)
Die Hard (BD)
Dirty Harry (BD)

The Bourne Trilogy (HD-DVD)
Pitch Black, The Chronicles of Riddick (HD-DVD)
Infernal Affairs Trilogy (Blu-ray)
The Matrix Trilogy (HD-DVD)
Mission: Impossible Trilogy (HD-DVD)
National Treasure 1 & 2 (Blu-ray)
Pirates of the Caribbean Trilogy (Blu-ray)
Resident Evil Trilogy (Blu-ray)
Spider-Man Trilogy (Blu-ray)
Die Hard Collection (Blu-ray)
Ocean's Trilogy (Blu-ray)
28 Days Later & 28 Weeks Later (Blu-ray)
Dirty Harry Ultimate Collector's Edition (Blu-ray)
Fantastic Four 1 & 2 (Blu-ray)
Rambo Series (Blu-ray)
Harry Potter 1-5 (1, 2, 3 & 5 on Blu-ray; 4 on HD-DVD)
Ice Age 1 & 2 (Blu-ray)
Transporter 1 & 2 (Blu-ray)
The Fast and the Furious Series (HD-DVD)
Elizabeth & Elizabeth: The Golden Age (HD-DVD)
Meet the Parents & Meet the Fockers (HD-DVD)

I excluded series in which some of the entries still haven't been released in HD(i.e. Lethal Weapon, the Living Dead series, the Evil Dead series, etc.).

Mission: Impossible
Pirates of the Caribbean
That's Entertainment

I'm not sure if they count, but I also have Clint Eastwood's WWII movies Flags of our Fathers and Letters from Iwo Jima.

28 Days Later / 28 Weeks Later (BD)
Bourne (HD)
Die Hard (BD)
Dirty Harry (BD)
Harry Potter (BD)
Pirates Of The Caribbean (BD)
Spiderman (BD)

Doughboy, you don't have the complete series of Ice Age since I just saw a trailer of Ice Age 3 - Dawn of the Dinosaurs. :-) And if I had to guess I'd say there will be another National Treasure, Saw, Mission Impossible. And Fantasic 4 and Harry potter are confirmed already.

If you have all of a series that is currently available, because the latest installment isn't even in theaters, then you have all of a series that's currently out.

I have all the Pirates of the Caribbean and all the Harry Potter films.

I owned 2 and 3 of Mission: Impossible on SD and all 3 on Blu-ray

I own Weeds through S3 on Blu-ray but none on SD.

Once Harry Potter finishes, I will ultimately buy the entire series on Blu-ray. I currently own up through Goblet of Fire on SD and nothing else.

Bourne (HD-DVD)
National Treasure 1&2 (BD)
Spiderman Trilogy (BD)

... will soon get:

PotC (BD)
Oceans Trilogy (BD or HD-DVD)

I already considered the Ice Age dilemma, but until the new one hits theaters, it shouldn't count.

Bourne (HD)
Pirates of the Caribbean (BD)
Harry Potter (HD & BD)
Weeds (BD)
Mission Impossible (HD & BD)
Chronicles of Riddick (HD)
Mummy (HD)
Superman (HD & BD)
Underworld (BD)

Will own Dirty Harry at some point.

Spider-Man
Bourne
Weeds

Wow, and I thought I had a lot of film series until I saw Doughboy's post!

If it makes you feel better, I just deleted the Saw series from my post. I forgot I have the first film only on DVD. I'm waiting for the inevitable Blu-ray double-dip that includes all the extras.

national treasure 1 and 2
the resident evil triolgy
the spiderman trilogy
alien vs predator 2 pk.

National Treasure 1 and 2 - BD - also SD
Resident Evil trilogy - BD - also have RE 1 & 2 on BD from Germany, have multiple versions of all three on SD from R1, Germany & Japan
Oceans Trilogy - HD - also SD
AVP - BD - also SD
Matrix - HD - also SD
Harry Potter - all 5 on HD - Order Phoenix also on BD - all 5 on SD
Pitch Black/Riddick - HD - also SD
Romero's ...Dead * - Dawn & Day BD - Land on HD from N.A. & Australia (Aussy superior) - all also SD, also some from Germany & France *Night & Diary not yet on hidef, but I'll have them when available
Terry Gilliam * Director's Collection - 12 Monkeys, Fear & Loathing, Tideland, Brothers Grimm & MP's Meaning of Life on HD - Adventures of Baron Munchausen - BD *Jabberwocky, Time Bandits, Brazil & The Fisher King not yet on hidef but are must haves - all on SD, Fisher King & Baron Munchausen also on LD

As I, like most here, could really run up their lists by including series/collections that are to date incomplete on hidef, like my last 2, I'll stop there

Somehow I have more than I'd been tracking....I don't catalogue anymore, so I'm probably spending more than I've budgeted for, but that's OK....this is my vice

Weeds (BD)
PoTC Trilogy (BD)
Die Hard Quadrilogy (BD)
Dirty Harry Ultimate (BD)
Spider-man Trilogy (BD)
28 Days/Weeks Later (BD)
Harry Potter Collection (BD)
Fantastic Four 1 & 2 (BD)
Ice Age series (BD)

I no longer have these sets, but hope to add these back after they're released on BD
Elizabeth & Elizabeth: The Golden Age
Bourne Trilogy
The Matrix Trilogy

Bourne
Ocean's
Potter
Spidey
Die Hard
Pirates
Heroes

Bourne
Heroes
Matrix
Planet Earth
Harry Potter
Spiderman
Die Hard
National Treasure

Complete to Date:
National Treasure BD
Superman (Superman, Superman II, Superman Returns) HD DVD
Pitch Black / Chronicles of Riddick HD DVD
The Mummy (own original and Returns, don't own Scorpion King yet, so not sure if I should put this in the list below) HD DVD

Missing One/More Titles:
Bourne (need Ultimatum) HD DVD
Terminator (have 2 and 3, need original) HD DVD
Elizabeth (need Golden Age) HD DVD
Dirty Harry (just have original) BD
Mission: Impossible (need 3) HD DVD
Rambo (need the boxset) BD
Fast and the Furious (have the 1st and 3rd, refuse to own 2) HD DVD
Spider-Man (only own 3 so far, need the boxset) BD

Ones I Would Like:
Matrix HD DVD
Pirates BD
Harry Potter HD DVD
Infernal Affairs BD
Fantastic Four BD
Transporter BD
Weeds BD

Mission Impossible
POTC
Superman
Lost Season 3 (only one available) other 2 in SDDVD