I'm not too familiar with Slater's work, apart from Tangled, Sister Act (both of which I enjoyed) and The Little Mermaid (I found most of the new songs to be pointless, but I like She's in Love). Who else has Menken written with lately? Jack Feldman wrote new lyrics for Newsies, maybe he could work on Doubtfire?
"Contentment, it seems, simply happens. It appears accompanied by no bravos and no tears."