This talk of the Panthers moving home grounds to a shared stadium with the Tigers absolutely will not happen.
Panthers itself gains a shit load of revenue on game days and they aren't about to give that up to play 25 minutes down the road in the middle of nowhere, next to an airport.
If the Tigers want a better stadium, and they absolutely deserve it, they need Campbelltown completely redone and will have to do it on their own or with the A League. Or, explore Liverpool with the Bulldogs.
Penrith have no need to move. Their stadium services them just fine. If they need to increase capacity, they should go along the Newcastle route.