Into the Forest I Go

On another new world, shrouded in mists and forests, a group of Jedi look out across the horizon. We can see Jecki here, as well as Yord and perhaps Sol leading them. Interesting to note on our right is a Kel Dor Jedi. Plo Koon in the prequel trilogy (noted fave of one David Filoni) was the most famous Jedi of his kind that we’ve seen so far, but could this be him? The answer is… we dunno, maybe?
The contemporary Star Wars canon has little to go on for Kel Dor lifespans, but in the EU, some sources Kel Dor lived for on average 65-70 standard years, but others, specifically for Plo Koon’s age, suggested that some Force-sensitive Kel Dor could live much, much longer (Dark Horse’s Clone Wars comics tie in suggested Plo was in fact hundreds of years old!). The Acolyte is set about 100 years before the events of The Phantom Menace, so depending on the source—whatever we have, they’re still non-canonical at the moment!— this could be Plo. A much, much simpler answer is that there is more than one Kel Dor among the thousands and thousands of Jedi in the Order.