Chrome Aardvark wrote:
We might also get things like MTU and MTIO appearances thrown in as well.

The presence of GS Spider-Man #2 in Volume 1 does suggest they are going all-in and reprinting every appearance, even guest shots.  Marvel Team-Up presents a bit of a problem though because he's cover-featured on two issues (#84 and #85) but issue #83 contains the first part of the story, despite having no Shang-Chi in it. 

There's also What If #16.  I would think that's a lock to be included, as it was written by Moench.