I think it is still very open and really will come down to Game 5 performance. The MVP is not necessarily the highest scorer, but the one who has turned the game.
Ware is the obvious choice for United fans to get excited about. Apart from that, the quality drops away when they are put under pressure.
For the Sixers, the field is a little more open.
However, over the series so far, looking at the Index points and the +/-
Melbourne:
Prather: 69 Index, -13
Goulding: 57, -3
Wesley: 52, -22
Boone: 46, -23
Ware: 41, +2
Barlow: 40, +8
Andersen: 35, +36
Hooley: 13, -12
Majok: 10, -5
Adnam: 7, -10
SmithMilner: 5, -18
Based on that, Prather would be the hot favourite, but Andersen is actually pretty impressive.
Sixers:
Creek: 74, 0
Johnson: 67, +49
Deng: 67, +21
Shorter: 59, +25
Moore: 53, -15
Sobey: 47, -10
Childress: 24, +17
Drmic: 23, -24
Hodgson: 12, -14
Doyle: 1, +4
Teys: 0,-3
Larkins: 0,0
Based on that, I would say Creek is currently leading all players, BUT, the fact that Johnson is +49 on his +/- shows how important his performances have been.
My Top 5:
Johnson
Creek
Prather
Shorter
Goulding
Honorable mentions: Deng, Andersen