I wanted to post a few thoughts on this one-shot book without sprinkling too many spoilers in other threads. I don't think I'll have the energy to track this "event" the way I did with Secret Empire though. In any case:
Marvel Legacy #1
I can't really fault Marvel for wanting to do this. They are in a bit of a slump and it seems like a no-brainer to try and recapture some of what the older readers say they want. At the same time it seems to me that what readers say they want or think they want doesn't always equate with what they are actually willing to buy or read.
Most of the art here looks great and Jason Aaron does his usual solid job with the writing. However, this reads a little bit like a hybrid of DC's Rebirth and Metal books. We start off by learning that there is a secret history of the Marvel U involving caveman era super heroes and celestials. How can this be? Anyone who follows Marvel continuity knows it's not possible. Stay tuned..
The rest of the issue mostly sets up scenarios by which various dead heroes are returning. They are, of course, the iconic older heroes that Marvel has largely been ignoring. And we see what appears to be a new direction for Wakanda and a hint at a Fantastic Four reunion. Again, how is this possible? What's the mechanism?
In a way, this story is a sort of sequel to the Secret Wars series. The continuity that was created by Reed Richards at the end of Secret Wars appears to have been manipulated once again. This time by Valeria Richards. Why does she need prehistoric super heroes, Celestials and Infinity Stones to be a part of this? Not clear yet. Apparently she wants everything to be "ridiculous" and "magical." It all sounds a bit too derivative of the stuff we saw in the Rebirth comic if you ask me.
I'm not sure what I'll actually buy yet. I'll probably mostly just stick with the stuff I already follow. But something like a new Marvel Two-In-One comic does ring the nostalgia bell a little bit.
What about tie-ins you ask?