I don't think so.
The entire Ivalice Alliance series was created by Akitoshi Kawazu after Matsuno had already left the company, so they still had plans to support that world even with Matsuno gone. Also, you have to remember that the Fortress project was given to GRIN in late 2008, which is long after all the Ivalice Alliance games were released, meaning the poor sales of those games didn't hamper Square Enix's support of that world. You'd think that the poor sales of FFXII RW, FFT TWoTL, FFTA2, and FFXII IZJS would make them not even think to make Fortress at all, yet alone outsource it to a Western developer.
It's also important to note that Square Enix pulled the plug on Fortress only after 6 months due to quality control issues. By the sounds of it, they didn't want a poor game released under the Ivalice Alliance brand. Therefore, I'd argue that the IP is still important to them as they wanted to protect its quality. I think the Ivalice Alliance series is just dormant at the moment, just waiting for the next wave of games to be released. The same can be said about the Compilation of FFVII. After the release of FFVII ACC in 2009, it went dormant, but now with the upcoming release of FFVII G-Bike,
Kitase has said that more FFVII games may follow.