Anagrams are a staple of fiction. Just see here.
You kind of have to wonder why, because they never come up in real life.
In fiction, things somehow need to be more significant, more meaningful, than the random events of real life. Writers have a desire to imbue significance to things that normally wouldn't have any. It's unrealistic, but it's also something that's expected and provides a measure of satisfaction to audiences when they see the connections. So don't shy away from embracing it, just because it's unrealistic.
Commentary by memnarch (who has not seen the movie)
This feels so obviously like Sally. She's already been noted to like Harry Potter, and Voldemort did something similar in one of those books, if I remember right. So far, Kylo also seems about as poor a villain as Voldy in terms of actually being a capable evil leader, so there's another point to Sally. At the same time though, Kylo's nowhere near Han in the images but still swinging the lightsaber or something in the middle panel. Plus, this would be a heck of a step up in image editing from the laser sword or eyes, which are basically the only instances since the beginning of the comic.
.... Never mind, this has to be an Irregulars' creation. I just caught that it's practically the same panel as the last one here, only with a red filter applied. I wonder if the middle name is made up as well. It'd be a heck of a coincidence if not, but "Nabidalo" has a Star Warsy feel to it that makes me hesitate to 100% say it's not official.
Hmm, and which boy did Anakin attack again? This one waaaay back? One of these ones? Technically Luke via mind control? Someone Darth Vader attacked who Kylo thinks was Anakin? Hmmmmmmm. Or maybe this is Anakin in a stolen clone-body! If Yoda came back and changed somewhat, why not Anakin? The stolen body could even be the clone of Luke for maximum confusion!
Transcript
(No Name): Anakin? He died over 50 years ago. Anakin was before your time.
Kylo Ren: Anakin is my past, present, and future.
{Kylo Ren writes his full name in flaming letters in the air with his laser sword}
[SFX]: whooom... whooom... whooom... whooom... whooom... whooom... whooom...
Flaming Letters: KYLO NABIDALO REN
{He waves and the letters of his name rearrange themselves}
[SFX]: whooom...
Flaming Letters: BOY ANAKIN ROLLED
(No Name): You. You’re the heir of Anakin.
Finn: I thought Luke was the heir of Anakin.
Chewbacca: Wait. What does “rolled” mean in this context?
Kylo Ren: I’m the boy Anakin attacked!
Kylo Ren: Do you know how hard it is to come up with a decent name anagram?!