You don't see Jeff Hardy as a worthy champion, but that's ya know, an opinion. Other people may/may not disagree with you, and you never really know what WWE will do. Not saying your wrong, but also saying an opinion isn't going to validate whether or not Hardy will main event at Mania.
As for the Rumble/Chamber storyline, I really really hope they don't go for it. It will render winning the Rumble or Chamber utterly pointless, with 29 other guys possible to be able to use that win for a big push, having Hardy win it, just to say "I don't want it?" what? So he beat 29 other men or 5 other men in a grueling career shortening match for a shot against Christian? What is he, Jesus or something?