I flipped between greys and ER, Abby and Luca got married.
I don't think the wedding will happen. I think he'll get cold feet at the end. They just need to finally give Izzy a life instead of all this drama, but then without drama you wouldn't have a show.
However, just once I'd like to find a series that lasts where everyone doesn't have to sleep with everyone else all the time, especially when it's an affair. I keep trying to teach me kids to not do this stuff but it's all we see on TV.