Conor McGregor. Image via: Getty ImagesConor McGregor is already teasing a comeback, just days after his long-awaited UFC return ended in a first-round injury loss to Max Holloway. The Irish former two-division champion posted a birthday video on Instagram declaring he'll fight again, even though doctors suspect he tore his ACL at UFC 329.McGregor turned 38 on July 14, celebrating with fiancée Dee Devlin and a can of his MAC Energy drink days after the injury that ended his five-year comeback bid in just over a minute.Conor McGregor teases comeback amid birthday celebrationIn the video, McGregor repeated the phrase, "We'll be back! We'll be back!" He wrote in the caption, "I am 38 years of age today! 38, no hate! Just love ❤️," thanking fans for their birthday messages. The clip marked his first public update since the injury derailed his return fight at T-Mobile Arena in Las Vegas. McGregor recently revealed that he is planning his return after recovery.Conor McGregor does not have a return timeline after disappointing comeback after 6 yearsMcGregor's night ended just 69 seconds into the first round after he landed awkwardly on a jumping kick attempt and immediately appeared to be in distress. Referee Mike Beltran stopped the contest at 1:09 once it became clear McGregor could not bear weight on his right leg, the same leg opposite the one he broke in his 2021 trilogy loss to Dustin Poirier. UFC president Dana White told reporters doctors suspect a torn ACL.McGregor addressed the injury directly on X afterward, describing it as sudden and unexpected. "This came out of nowhere," he wrote, adding that he'd been throwing the same kicks throughout fight camp without issue. UFC broadcaster Joe Rogan offered a technical explanation for how the injury occurred, noting that landing a jumping kick in the wrong position puts extreme pressure on the knee. Elsewhere on the card, Liverpool's Paddy Pimblett scored a first-round submission win over Benoit Saint Denis in the co-main event.Fans react to Conor McGregor's return speculationThe reaction on social media split between longtime supporters and fans losing patience with the on-again, off-again comeback narrative:@Chimp_outt: "I speak for everyone when I say we will not watch this guy again"@RaisedRightMMA: "The MAC says he will be back!! But the question is when?? Glad to see him in good spirits!"@hannahpierre4: "Looks like the only thing he's fighting now is his own echo. Can't wait for the sequel. 🙃"@Jamieminer: "Your boy is getting ready for rematch #3 to win all your money back 🎯👊🏽"@JerseyMadeMike: "We'd love to see it but after the last fight highly doubt we will see it"@j0ewinn: "I'll have Conor's back till I die. I don't sell out on my people. 🇺🇸🇮🇪"The responses reflect a fanbase increasingly divided on whether McGregor, now facing a serious knee injury on top of a 1-4 record in his last five fights, still has another run left in him. For now, the only certainty is the recovery timeline ahead of him.