no, we can't.
it's ALL ocean, and as FE exceedingly small for the "radius of action" required for WW2 NA, simply won't fit the bill.
now, given the Atlantic has a surface area of 106 MILLION square KM, the region we'd need, not counting those parts of the Arctic Ocean, my guesstimate would be ~ 20 million square km, as outlined in green below (mind you, terrains have to be square, so add more Greenland to the west -which can be ignored)
So, my guesstimate of 2500 km per side (which may be to small by a factor of 10; maybe 3500km per side would be better).... may still give us a map with the "usual" issues of scale; even at 1:1 (as opposed to the standard 63% size). And the TE has "problems" with higher latitudes (Mercator distortions)
I can't even begin to imagine the sheer amount of time to tile; let alone to build target areas for the thing with any amount of accuracy.
oth, it would be a great Cold War map as well, modeling the GIUK gap
still, not something I'd want to attempt, even if I could get the frakking TE to accept the DEM without crashing (provided one of proper scale could be located)