It appears that UFC 191, to take place Sept 5 in Las Vegas, will feature a heavyweight attraction about ten years in the making.

But — it’s not official yet.

That fight would be a pairing of former UFC heavyweight champions Frank Mir, who won the title in 2004 with an armbar submission of Tim Sylvia;, and Andrei Arlovski, who won an interim version of the title the following year.

According to Ariel Helwani on UFC Tonight, the Arlovski vs. Mir bout is “targeted” for UFC 191, which is to be headlined by a flyweight title bout between champion Demetrious Johnson and challenger John Dodson. A video clip of the announcement is available from Fox Sports.

It’s somewhat surprising the bout has never taken place. But then — Mir never got a chance to defend the title he earned in 2004, after suffering injuries in a motorcycle accident. Arlovski, of course, would later be promoted to UFC’s “undisputed” champion — but lost that title to Tim Sylvia in 2005.

Since then, both have had their ups and downs. Mir earned the UFC interim title in 2008, while Arlovski began plying his trade for other promotions.

Both are now enjoying a career resurgence in the UFC: Arlovski is on a five-fight win streak and has risen to the #4 ranking among the promotion’s heavyweights, and Mir, who is ranked tenth, has scored two straight first round knockouts.

Helwani mentioned that heavyweight Alistair Overeem, who is ranked ninth in the division, is also being considered for the event. Overeem is said to be hopeful for a bout with former titlist Junior Dos Santos.