Mike has already said that Wormholes would both be in the game, and will have the ability to move. Some will also destroy your ships as well, although Mike described what was happening as the ships will actually get stranded off the edge of the map and you will therefore be unable to control them because you can't see them to issue orders to.
...So there's no need to program some special circumstances for the Wormholes because they're going to natively doing all this as part of their programming.
Stablising Wormholes and having triplicate end points isn't something he has discussed with me though. To my knowledge, triple-Wormholes aren't a canon idea either. It's therefore anyone's guess whether Mike has even considered these features, let alone even made a decision about whether to include them.
I've also included the Nexus as one of the random events, but we don't know for sure yet how the randoms exactly will work. The Crystalline Entity, Gomtuu, the Chodak, the Husnock, the Doomsday Device, Echo Papa 607, Giant Amoeba, the Calamarain, Species 8472, and Space Pirates are also in my list.
_________________"Anyone without a sense of humour is truly at the mercy of the rest of us."