Highly unlikely. There is a limited pool of high-end donors to either party, and campaigns float only as long as donors permit it. Sure, there’s going to be 30 candidates at first. And after the donors get through deciding who does or does not get funding–and this includes the input from the DNC–then that list is probably 3-5 when things get serious early next year.
These early candidates are trying to pull an Obama–see if they can get into big donors early by doing a smashing audition. Most will fail, either because they favor the wrong policies (50% of Tulsinator) or they’re just a crap variety of a stronger approved candidate (Castro).
With Warren in play, the bar’s pretty high to get into this game, so thee announcements are generally dart-tossing by the ambitious to see if they can get lucky when being a candidate is still dirt cheap.
It won’t be like this a year from now. Problem is we’ll still have to suffer through the beauty pageant of the recklessly ambitious until power sorts them all out.