Once Kodak E6 stocks are completely gone from dealer warehouses (a matter of days for some films), Fuji will jack up the price of their abbreviated E6 films, and then follow suit by discontinuing their E6 films altogether a la Kodak. This is not from any official announcement, but based on a long recent history of Agfa, Kodak, Fuji, etc.
As for the C-41 films, Kodak just signed a contract with the motion picture industry to manufacture color films for them to the year 2015 - but Kodak included a clause stating that Kodak can discontinue making film any time before then... Kodak Portra 160 is almost $40 for a 10 sheet box of 4x5. Fuji doesn't even make color negative sheet film anymore.
Right after I bought most of Adorama's stock of 120 format Fuji Reala 100, they raised the price overnight of their remaining stock by about 15%. I couldn't believe my eyes, so I checked my invoice. Yes it's true.
The writing is on the wall, and with a braille plaque beside it.