I don’t think DCA would ever see a fume ride. It takes too much space with of what DCA occupies and it layout. I wouldn’t mind for an exciting dark ride in place of Goofy Sky School though.
Several of the new fume rides at Tokyo DisneySea take up no more space than a Midway Mania or a Monsters Inc. or a Philharmagic theater at DCA do. There's currently three plots of unused land in DCA that could be used to build similar rides the size of the three E and D Ticket rides at Tokyo DisneySea's new Fantasy Springs area.
For instance, the entire Rapunzel ride complex in Tokyo sits on 65,000 square feet of land.
The Peter Pan ride complex in Tokyo, including the rockwork and waterfalls in front, sits on 90,000 square feet of land.
The Frozen ride complex in Tokyo, including the mountains and nearby food/retail buildings, sits on 105,00 square feet of land.
The Monsters Inc. and abandoned Stage 17 soundstage next door on its west side sit on 78,000 square feet of land.
The second parade float warehouse built at DCA in a panic in 2002 to house the Electrical Parade floats located behind San Fransokyo and Cars Land is 75,000 square feet of land.
The unused Hyperion Theatre and the abandoned soundstage next door to it on its north side sit on 122,000 square feet of land.
The unused backstage area south of Marvel Land and east of Cars Land sits on 355,000 square feet of land.
There's plenty of space for multiple new rides at DCA, fume or otherwise, without even touching the Simba lot across Disneyland Drive.
There was a fume ride in this DCA concept art.
It's not just the fume ride missing, it's that type of thing that DCA lacks in and around Pixar Pier; movement and layers.
Heck, they abandoned the wave machine during the Bush administration and are too cheap to throw a few fake buoys out there. Instead, they've just let it look like this most days since 2010...
And that's on a good day. Some days you show up at DCA and they're just doing this all day...