3 Team Map for DOTA 2?

This suggestion has come up a lot in the past, with the main reason it was not being taken seriously being that icefrog should not take time off the main DotA map to develop it.

Since Valve is running the show now, and with a new engine, possibility?

Here's my idea of what a 3 team map should look like, probably 3v3v3 or 4v4v4.

Legend:

3 big circles - 3 bases

white areas - lanes

light blue - river

green spray - jungle

blue dots - neutral creeps

blue circle in the middle - mega creep (appuhami ftw!)

coloured squares - towers

yellow squares - shops

red dots in river - rune spawns

orange lines - cliffs

Ideally the creeps going down the middle lane would randomly split in two and go in two directions. Roshan would be on an elevated island in the middle.