My understanding from all this was that IW didn't want to make MW3 right away, they wanted to put it down and do some new IP.
Activision with a billion dollar franchise didn't want this, so they came up with a way to force IW to make MW3. Which was basically try and forfeit their bonuses MW2 earned them and have that pay go towards making MW3.
After IW wouldn't have this they fired the top 2 (can't remember their names) which they said voided their contract bonuses for the rest of IW.
Them been accused of going to EA was the easiest way for them to be fired.
I hope Respawn entertainment make some new awesome games and not just another god damn modern warfare shooter. MW2 was boring same old, MW1 was amazing and revolutionary. Without the chains of their former masters I hope they can break the mould once again. Remember Activision didn't want IW to make a modern shooter, they wanted to keep COD in WW2.