No. The UFC, along with all fightsports, is about the biggest possible fight in the here and now in perpetuity. They always want to make the most money they can now, bottom line.
BJ Penn is the best example of this sort of issue...it did nothing to hurt his popularity losing to GSP, people just loved him more for having the cajones to seek out the biggest fight.
This isn't an issue for the UFC, the reason these fights don't happen is simply because champions don't want to move up in weight class. Safety first these days.