I like all of these ideas, though some of em use villains i don't plan to reuse like Lady X and Painis Cupcake. If Snively is replaced with someone else though, i could do the third fight, and i wasn't originally planning to bring back Iron Sky but Nemo vs. Adler sounds very tempting. Also Shinji vs. Megatron will happen very soon ;)
Iiiii have no plans to include Skeleton Warriors or Pirates of Darkwater in this, as most of the series i have plans to use in Part 1 have already been introduced. I do like the idea of first and fourth fight though.
Well without giving away anything, two of those series is already in the last, some i am interested in using, some i need to learn more about to see if they fit in, and some i don't want to use. Thank you for your suggestion.