Other than Strike Event. Like, same thing as battle arena but you fight against AI. But to make it so that the PvP is still encouraged, it is only done a certain amount of times for the incubators. Perhaps have it like the incubator thing in the battle arena now and it just gives coins and cash with a daily limit on the coins and cash (separate of the limit from the current limit).
Maybe have the same type of arenas for PvE that you have for PvP with the dinos they have in the PvP arenas. Maybe have 2-3 incubators total from this, whereas PvP it depends on the incubators you get from victory, plus the daily one where you kill 10 creatures.
It gives more chance of getting the dna you need from arenas and more chances at getting coins and cash. Something would have to be done about the later levels to make people want to compete in PvP though, otherwise people would just PvE all day instead.
I’m putting this here because you asked about the PvE things in a survey and I would actually enjoy that too. And at a higher level, you need more gold to level your creatures and this would help in that aspect.