This promotion has been running for at least two weeks, and I just found out about it. I didn't see anything on here about it yet, so if anyone is interested there are four Marvel Comics available with kids meals at Taco Bell. (Or, you can just pay the 99 cents they charge for a toy.) They come sealed in a polybag with the typical child safety warning information and the Taco Bell logo.

The four are:

The Avengers
Captain America
Fantastic Four
Thor

They're brief, but ad free (save an inside cover ad for Marvel's website and an obligatory inclusion of the Taco Bell logo somewhere). I'm not a Marvel reader, but I'm aware of some of the recent Civil War events, so these do not appear to reflect current continuity.