Moira Brandon wrote:
Well, my opinion is that I think it is a bad idea. First of all, you are right... the X-Men Mutant Massacre HC dates from 2010 and I supose is enought unavaliable to reprint it again or at least make a new omnnibus adding the pre fall of the mutants material. Because I have the massacre HC I prefer just a Pre-Fall of the mutants oversized Hc, in style of the others,because if not, the result of mixing massacre with pre-fall would be, at least:

- Uncanny X-Men #210-219 plus Annuals #10 (Mojo/Longshot) and #11
- X-Factor #8-17 plus Annual #2
- New Mutants #46-54 plus Annuals #2 (Mojo/Longshot) and #3
- FF vs X-Men #1-4
- Avengers vs X-Men #1-4
- Thor #373-374, 377-378
- Powerpack #24
- Daredevil #238

Well, I would love to add Longshot #1-6 and Mephisto Vs... #1-4, plus a pair of Marvel Fanfare stories related with the stories, but I think there are a lot of issues, perhaps more than an Omnibus can afford.
Thats why finally I think its better Split it in two books, one Massacre HC and one Pre-fall of the Mutants HC.
I have the Fall Of The Mutants Omnibus, I would not like to sell my FOTM Omni at a loss on cost, just to buy another FOTM Omni with more issues.

I would also prefer pre Fall in a volume by itself. 

Reprint FOTM Omni and release pre Fall by itself and everyone should be happy.