Trelawney Planned, Mundungus Fletcher Not, for Order of the PhoenixOotP Film
As rumored around the Web, we've been able to confirm that the role of Mundungus Fletcher is not currently written into Harry Potter and the Order of the Phoenix. That doesn't mean it won't change, or that WB has said so; but as of this moment, he's not there. The character of Trelawney is; however, this doesn't mean that won't change with a rewrite, or anything regarding the recasting of Emma Thompson in the role. More news as we get it.
Edit: The Mundungus rumor was first posted on Snitchseeker.com; thanks Richard!