@Mr. Skeleton - yes, I see the main software being download-only, no physical disc. I suppose you will always have the need for some sort of starter pack that will include the base - that's the only actual roadblock to going digital-only and still allowing new people to come on board.
As for the cost of a Starter Pack - I know it seems expensive, but let's break it down. An average videogame costs between $50 and $60, and the MSRP of a DI starter is $75. Let's be generous and say the game is $50, which leaves us with $25 to split up between the Infinity Base, three figures (in 1.0 and 2.0 Marvel) and the Playset piece.
MSRP for a figure is $14, and the Playset with two figures is $35. Therefore the value of the Playset piece is equivalent to $7.
(1 game X $50) + (3 figures X $14 = $42) + (1 playset piece X $7) = $99
Already well above the $75 MSRP of a starter set, and it doesn't account for the base, for which we have no idea of the value - let's call it $10. So that's $109 "true" value for a Starter Set, $34 loss (based on the "true" cost of the contents) - and I've never paid $75 for a Starter Set, more like $55, which is a $54 loss.
Even with the latest 3.0 starter, with two figures:
(1 game x $50) + (2 figures x $14 = $28) + (1 playset piece X $7) + (1 base x $10) = $95: a $20 loss. Find it on a good sale during the holiday season and that will be $40 loss.
Meanwhile, the download of 3.0 on Wii U and PS3/4 is $20 through the end of the year ($30 on XBox 360/One). In order to account for new players, the base still needs to be sold, but no one is going to just buy the base by itself. The 'new' starter pack, then, is the base, two figures, a playset piece, and a code good for a digital download of the game:
(1 base x $10) + (2 figures x $14 = $28) + (1 playset piece x $7) + (1 digital copy x $20) = $65. Then allow for discount of up to $20 during the holiday season for a $45 sale price, and that's a $20 loss ON THE SALE PRICE - or the cost of the download (which is all gravy anyway).
Add to that the fact that, essentially, this starter pack is almost fully platform-agnostic (aside from XBox - based on history, both 360 and One will need their own separate starter packs because the base is not back-compat). Wii U, PS3 and PS4 can all share the same starter pack. That's less package printing they have to do, reducing the over-all cost of production, as well as the cost of designing/pressing/packaging the game discs.