I'm sure it's probably been addressed before but I wanted to ask, why is Deadpool: Merc with a Mouth in your time line? I don't think anything in that comic has anything to do with the Ultimate Universe. I realize that is involves a character (or characters? I haven't read it) from the Zombie Universe, which had a direct impact on the Ultimate Universe, but personally I think the Ultimate Marvel time line should only include the Ultimate comics (of course), and the comics featuring characters from other universes that have interacted with characters from the Ultimate Universe. If you include comics that have secondary connections (characters that have interacted with characters that have interacted with Ultimate characters) then it's just going to get ridiculous. In that case you'd have to include a whole lot more. So really I don't think it should be included. I also don't think Marvel Zombies 4 has any characters that interacted with the Ultimate Fantastic Four during Crossover (the Zombie Universes only connection to the Ultimate Universe) but I could be wrong there as well as they encountered a LOT of zombies.
However, I do think the members of the Earth-712 Squadron Supreme that appeared in Ultimate Power and their respective comic books should be included in the time line. They had an all out brawl with the Ultimate Universe's heroes, which is a much more important connection than UnDeadpool's head has with anything. If you want I can definitely help you out with where all the Earth-712 Squadron Supreme's issues fit in (don't worry, there aren't that many).