Despite the crazy feud between the two, DC tells us he wasn't going to let Jones dictate his weekend -- and instead opted to take his wife and kids to the Magic Kingdom in Anaheim, CA -- 260 miles from the Jones fight in Vegas.

There was a good reason for the trip ... DC's daughter, Marquita, turned 7 years old and the UFC champ wanted to do something special for her birthday.

Of course, while Cormier was enjoying the Happiest Place on Earth, Jones put a beating on Anthony Smith at UFC 235 ... boosting his official record to an impressive 24-1-1.

Jones doesn't acknowledge his 1 loss -- because it was due to a disqualification from an illegal elbow in a fight he was otherwise dominating.

It was almost deja vu for Jones this weekend -- he hit Smith with an illegal knee and was THIIIS close to being DQ'd again ... but Smith took the honorable path out and opted to continue the fight.

Jones won in a unanimous decision.

Cormier -- the reigning UFC heavyweight champ -- and Dana White say he's gunning to set up a 3rd fight with Jones before he hangs it up for good.

DC lost the first time he fought Jones and was KO'd in the rematch -- but that 2nd loss was later ruled a "no contest" because Jones tested positive for a banned substance.

So, will DC agree to one last brawl with his arch enemy?