I'd say nothing. You just have info that it will be coming up in the next round is all. The research hand is just to let teh Chief Scientist have a peek at what's coming next. They can either take one card from that hand or two from the wormholes. If a Nebula card came up in that hand you wouldn't take it would ya? And if you did decide that strategically you did then all it would do is trigger that round.