I think you can only get Preferred Seating for Aladdin through packages now. I had read here that you could possibly get a "mini-package" in DTD with MTMM and Aladdin preferred seating but someone recently posted that you need to have a package already to add that onto it.
We stood in line for a LONG time (45 minutes?) and I would have gladly paid $10 to get preferred seating to Aladdin, as those folks walked up 5 minutes before the show started and got to enter before us.
P.S. I loved our seats in the second row of mezzanine section, NOT the orchestra, because there is a parade that comes through that walks right in the wide pathway between the orchestra and mezzanine and the orchestra seat guests had to turn around to see them. Plus, there's another scene later where orchestra folks would have had to crane their necks up to see above them and we didn't have to do that from our seats.