According to The Wrestling Observer, match finishes for the top WrestleMania bouts are said to have been decided upon and finalized.
One match finish that has yet to be decided upon is the Divas Invitational, however AJ Lee is likely to retain the title in that match as the feeling is WrestleMania will be very babyface heavy in terms of match winners, so a heel win in that match might be a good change of pace.