C'mon guys seriously? Darkrai is a forgotten wonder? I hadn't noticed, I certainly use it on all my offensive teams in ubers. It is in no way a forgotten wonder, if anything it should be more popular than ever with it being able to outspeed and sleep any form of CM Arceus...
And Deoxys-A, I guess its a wonder as an all out attacker and not a lead. I'm not convinced about how forgotten it is, or whether its a great pokemon to build around. Sure, it has a shit ton of raw power and is quite capable of mopping the floor with many teams, but it doesn't seem too exciting to me. The team that the community builds for it will be fine, jibaku and tmon will see to that...
But c'mon... c'mon!!! Use something exciting, something new.
I voted for Thundurus, the newest uber, who has prankster and good electric typing for ubers. You know you want to see what happens when your late game mixed/swords dance quaza has tailwind blowing for it... Thats the thing about Thundurus, it has so much utility:
Thundurus@Life Orb
Substitute/hidden power ice/focus blast
Thunder
Grass Knot
Nasty Plot
Use it to lure Groudon!!! Use it to bait and then kill Darkrai!! Or Dialga! Thundurus is fun to use, and while Darkrai is also a lot of fun to use, Deoxys-A is one of the most boring pokemon, imo.
Alternatively:
Thundurus@Leftovers
Thunder
Toxic/Thunder Wave
Grass Knot/Hidden Power Ice/Focus Blast/Taunt
Tail Wind
Support Thundurus is really fun, I know I put in a ton of options with all the slashes, but I really feel like Thundurus has massive opportunities to be a support pokemon that can also threaten offensively.
My main idea here is that the pokemon currently leading the polls, Deoxys-A (too boring) and Darkrai (if you think this is a Forgotten Wonder, I have to question how much ubers you have played) are lame and that people should do something fun (like Thundurus). I know that some people will disagree with me, I've always thought of ubers as a tier that was about creativity and fun, where there were so many good pokemon that if you wanted to build a team you didn't have to bog yourself down in maximum efficiency movesets. Being surprising is awarded in ubers more than any other tier! I'm not saying its uncompetitive, or that you should only use gimmicks, but think about how mundane Darkrai and Deoxys-A are.
EDIT: I also support votes for Bulk Up Dialga (a real forgotten wonder) and leech seed Shaymin.