The only upcoming Tiger & Bunny anime that has been announced are a pair of movies, the first of which will be coming out this year, but we haven't even been told what month yet. Very little info has been revealed about them at all at this point.
Unfortunately, no second season of Tiger & Bunny has actually been announced. All that was said is that they were considering a second season (http://www.animenewsnetwork.com/interest/2011-08-10/nikkei/producers-looking-into-2nd-tiger-and-bunny-season ). They never officially said "we're definitely making one!" I would be jumping for joy if a second season was announced, but until we actually get an official announcement that a second season definitely will be coming, there's really no reason to be looking forward to one, since it may never happen.