These are my predictions, but obviously it's nowhere near as simple as "winner takes all" aside from a few states.
If you look at it from a very basic view, Cruz is set to win in states that total 267 delegates, Trump 738 delegates.
From winner takes all Trump should up Arizona (58) Delaware (16) New Jersey (51) and Montana (29) (Though this will be a tough fight) vs Cruz's Nebraska (36) and South Dakota (29)
Trump: 154
Cruz: 65
Other high delegate prize states but not quite winner take all, Trump Wisconsin (42) Maryland (38) Pennsylvania (71) Indiana (57) West Virginia (34) California (172)
Trump: 414
He's not going to win all those delegates, but those are states he's poised to do well in so should pick up the majority.
The rest, New York (95) Connecticut (28) Rhode Island (19) Oregon (28) Vs. Cruz's Utah (40) North Dakota (28) Colorado (37) Wyoming (29) Washington (44) New Mexico (24)
Trump: 170
Cruz: 202
These are a mixture of states where either could walk away with a vast majority of delegates and some that are truly proportional.
Anyway, the field favours Trump massively but it's so unpredictable from state to state what delegates any of the candidates will come out with.