My question is; why would it have to compete?
Both BananowePole and Hawke make good points above, but I'm not certain why there would be need for competition in the first place.
They will more likely not come out near to each other in time.
They are not mmo/online games which removes the need to compete over a longer period of time.
And it's not like some other game genres where there are 10-20+ new games each year flooding the market. Isometric rpg's are few enough and long enough apart that I would guess most genre fans picks almost all of them up.
