My guess is it'll merge with The Episcopal Church. They've already got federated (joint) congregations in Michigan and Florida, and have hot-swappable bishops.
No, ELCA will still be around. Following the 2009 Assembly blessing homosexual behavior among pastors and bishops, the revisionist homosexual lobby will breathe a sigh of relief and carry on as if nothing has happened. After the bulk of traditionalists leave, ELCA like TEC will be much reduced in number—but their concern is buildings and trust fund assets, not membership or evangelism.
If I was sure I’d be around in ten years I’d take a bet on the ELCA being around still, too.
I think it’s more likely that FreeRepublic will bite the dust before this branch of the Lutheran church in America gives up its “Lutheran” designation.
They mutate names every few decades, but they always retain the doctrinal foundation and name of Martin Luther.