Libor Replacement – Impact on Bank

I am looking for banking industry experts to discuss how the upcoming replacement of the Libor interest rate will impact bank loans. Since so many variable-rate loans are tied to Libor, what will banks need to do in preparation for this change? Will some loans need to be renegotiated, or will banks just let Libor-pegged loans run off their books? In addition to adjustable-rate mortgages, which loan categories have the most Libor-pegged loans? What would most bankers prefer to see in the new Libor replacement?