i think giving JTG the belt is a good idea. i think you should give him maybe a triple threat title defense at mania as the opener.
a tyler black vs zack ryder feud for mania looks great
i think you should do at mania a 3-way tag match between kings of wrestling, msmg and the briscoes for the title as it could be a great match.
goldberg vs taker will be great and maybe you can have kane as the ref to add a little bit more awesomeness to it.
you should have these matches also at mania
HHH vs Punk
Orton vs Cena
for mitb you should either ave these guys win:
Yoshi Tatsu (your givin him a push)