In Mary Poppins Returns, Colin Firth’s character Mr. Wilkins is the current president of Fidelity Fiduciary Bank– the same place that Mr. Banks worked in the original film.
It’s still a mystery as to how Dick Van Dyke’s Mr. Dawes Jr. also factors into this narrative, but it’s clear that Firth is going to provide an antagonist for the sequel.
And with hard times falling on Michael and his family, he’ll have to appeal to the Bank to let him keep his home.