This conclusion, while weakly supported by a statistical analysis of the names involved, is rejected by most archaeologists, theologians, linguistic and biblical scholars.
There's a bunch of references for archaeologists debunking it.
I know you said "it might not be him" but I feel like that understates the weight of evidence against that possibility.
The respectable probability estimates range from astronomically unlikely to merely unlikely. In other words, we don't have incontrovertible ways of calculating the probability.
While it's not great or convincing evidence, it's the only physical evidence I know about.
If you're happy with this type of calculation then the probability that this tomb is that of biblical Jesus is (number of occupants) / (number of humans in that area at the time the tomb was built).
After reading that page, I strongly suspect that's not him. It's all based on statistical modeling, and it's been heavily massaged. Even with that, they give it 1/600 odds (on the low end) of it being random chance, which those aren't bad odds.
Apparently the inscriptions are partially illegible, so assuming it's even correct their statistical model is based on the name Mariamne being Mary Magdelene (which is clearly not the name we remember her by) and being Jesus's wife, Maria being the mother, and Jesus having a son, which we didn't know about, named Judah, as well as a few other assumption that really do not feel like they should be making.
Even making a ton of assumptions, the odds are still not particularly convincing. It feels like something that can increase someone's faith if they don't question it, but if you examine it at all reveals how much people are reaching to prove what they already want to believe.
I'd have guess people who thought the tomb was for the Jesus would have their faith shaken by it since it would mean Jesus was married and had a kid, though there are some obscure Christian sects that have believed that.