MMA fans are insistent that Alex Pereira is preparing to move up to heavyweight after seeing his recent weight gain.The former UFC middleweight (185lbs) and light heavyweight (205lbs) champion tipped the scales at a monstrous 243.8lbs during a weight check uploaded to his Instagram on Wednesday. Pereira traditionally walks around at 230lbs, so the added weight gain has led supporters to theorise that Pereira may be preparing for a fight against interim heavyweight champion Tom Aspinall for the undisputed strap.One supporter wrote: “Alex moving up to fight Aspinall for the undisputed heavyweight belt?”Another posted: “Imagine he’s fighting Aspinall instead of Jones or Ciryl.”A third added: “Alex vs Tom for the BELT CHAMA.”If the Brazilian superstar were to make the switch to the glamour division, he would be favoured for an immediate title shot, given the current lay of the land at 265lbs.Full champion Jon Jones hasn’t fought since last November and doesn’t look as though he will be competing anytime soon, leaving Aspinall vs Pereira as the biggest fight at heavyweight.UFC president Dana White recently confirmed that Jones has a couple of weeks to decide whether he wants to fight Aspinall; otherwise, he will be stripped of his belt.“Jon Jones has been an interesting human being to deal with since the day he got here,” White told Jim Rome.“But I will say this about him: you would never hear me out talking about he’s the GOAT [greatest of all time], he’s this and he’s that, if Jon Jones didn’t want to fight people.“We’ll see how this thing plays out over the next couple of weeks.Instagram - Alex PereiraPereira is 243.8lbs right now, prompting fans to theorise whether he will move up to heavyweight[/caption]Aspinall is the UFC interim champion and will fight for the undisputed belt nextGetty“But if we can’t get this fight done, we’ll move on quickly. “We’ll wait [a couple of weeks]. We’ll have answers in the next couple of weeks.”Jones has shown no interest in locking horns with Aspinall, while a petition to have him stripped of his heavyweight title is nearing 200,000 signatures.Aspinall himself has declared that ‘Bones’ is retired and that he will be fighting for the full world title next.At present, there is no clear contender for Aspinall to fight for the title.Ciryl Gane is ranked No.2, but he has already fallen to defeat in two world title shots against Francis Ngannou and Jones.Jones is the full champion but is expected to be stripped in the coming weeks if he chooses not to face AspinallGettyThe next highest rated fighter is Alexander Volkov, who lost a highly contentious decision to Gane in his last outing.As a result, the UFC could justify giving Pereira an immediate title shot, as he makes a play at becoming the first three-weight UFC champion of all time.