Some topics to consider:
will you restrict this to existing customers or will you open it up to new customers to the bank
will you expand the market area from your current area
will you include consumer and business accounts
will you be going into new states and need to consider state laws
the online aspects of regulations covering your products (TISA, Reg D, Reg E, Reg P, OFAC, BSA, CIP, OFAC, COPPA, FACT Act, etc.)
E-sign requirements
Signature cards - physical cards (yes or no); if no will you allow these customers to have checks...you will have two procedures if a no signature card customer comes to a branch
How will you approve CIP and clear discrepancies
How will you deal with potential OFAC matches
Authentication
Fraud - will need to watch for new things like multiple new accounts being opened that are funded from the same external account
Funding methods-ach, wire, checks?
Account number issuance (secure email?)
Vendor management