The title of the hearing is "Examining the CFPB’s Proposed Rulemaking on Arbitration: Is it in the Public Interest and for the Protection of Consumers?" It will take place Wednesday, May 18. The witnesses seem not to have been announced, but given the composition of the Committee, I think we can anticipate the majority answering that question in the negative.
Update: Mayer Brown Partner Andrew Pincus is to be one of the witnesses.