Turn it in for warranty 
VTwins dont like water, not like flushing a honda............You said it'll turn over so don't freak out yet. You should be good. I've sunk my Honda around 5-6 times.
ypu honestly dont want the answer to that question ... i would follow all the steps in recovery thread ... and be very aware of watching the oil dipstick ...Ok so I'm a real newbie at all this so does anyone Have a worst case scenario? Cost? What will be replaced? etc.....