6x21 Tommy Merlyn Returns Predictions

Theory
It has been confirmed that Colin Donnell, the actor who plays Tommy Merlyn, has appeared on set to film episode 21 of season 6, otherwise known as "Docket No. 11-19-41-73". But it get's us thinking: "What are the possibilities about his return since he's dead?" and I'm going to go over the things I think are possible to be the case. Ranked from, in my opinion, most possible to least possible.

Return
It is possible that someone needs Tommy Merlyn to be present at an event but since he's dead, they ask Christopher Chance, otherwise known as the Human Target, to act like Tommy. It could also be possible that someone somehow wants to convince Oliver Queen, otherwise known as the Green Arrow, about what happened to Tommy when Oliver was in a dark place like he's in now and that something like this could happen to someone else Oliver loves. ''In the trailer for the episode we saw Tommy Merlyn posing as the Green Arrow to keep Oliver out of prison. This is most likely Christopher.'' It is possible that by getting drugged by Vertigo someone could get an hallucination about Tommy. This person would most likely be Oliver. It is possible that there will be a flashback about Tommy in this episode. It is possible that Tommy Merlyn from Earth Two comes to Earth One because he maybe had a good connection with Laurel Lance, otherwise known as Black Siren, and maybe he could play a role in her redemption arc. It could also be possible that someone somehow got him to come to Earth One to talk Laurel out of her crime life with Ricardo Diaz, otherwise known as The Dragon. It is possible that somehow Tommy from any other earth in the multiverse chose to go to Earth One. The reason for this could literally be anything but this theory is highly unlikely. It is possible that Tommy Merlyn could get revived in some way, shape or form. This could be by one of the Lazarus Pits Thea,otherwise known as Speedy, Roy, otherwise known as Arsenal, and Nyssa may have already found. If that is the case he may become the new Dark Archer like in the comics, or he could've gotten revived by Ricardio Diaz in some way, shape or form. It is also possible that a new villain revived him. It is possible that through some means someone could temporarily get contact with the dead.
 * Christopher Chance/Human Target
 * Hallucination
 * Flashback
 * Tommy Merlyn (Earth Two)
 * Tommy Merlyn (Any other earth)
 * Tommy Merlyn (Earth One)
 * Communication with the dead

Verdict
In episode 21 of season 6, otherwise known as "Docket No. 11-19-41-73", Christopher Chance appeared to act like Tommy to try and help Oliver not go to jail. Which hereby confirms one of my theories.