Visiting Disney TVA at the Frank Wells Building this afternoon, I found the remaining staffers on The Replacements near the end of their gig:
"We've done fifty-two episodes, and it doesn't look like we're gonna get picked up for more" ... "The producer plans to pitch some ideas for a new season and told me: 'They didn't laugh me out of the room when I floated the idea'" ... "It kinda seems like we're done, my last day is Friday."
On the brighter side, Phineas and Ferb have just gotten a big pickup order:
"The buzz around the building is we get another 26 and 13, bringing our total to over sixty half-hours" ...
So P & F looks to be in production for a good little while yet. There are some other series at Frank Wells that look like they could go past their initial orders, but no official word on extensions have been passed on to the crews.