1) A possible place to train (maybe do a mission before this is allowed), should also be one at psy academy.
While I do think the Hero's team should be able to train in the desert headquarters with the rest of the Resistance, I don't see the point in having a trainer in the psy academy or Somnus.
2) Have something like Malignus, where if you reach a certain level in psy power (maybe around 45-60), your allowed to meet him and replay battles you have already played. Though unlike telepath rpg 2, you should make it so that you can only replay battles you have beaten before.
In TRPG2, I found that it corny that Malignus allowed the Hero to replay battles of the past.
3) A mini telepath rpg arena involving the best shadowlings competing and maybe a orb as an award if you win. (maybe also one for psy academy or other areas)
Arena battles sound like a lazy method for game makers to add more battles/levels without expanding the story or setting.
4) A place that allows you to telepathically through your mind to go through battles that were fought in telepath rpg 2. The purpose of this is allow a unique way for the characters to understand what happened to the queen. I don't if this will interfere with the current story because I think yawah might be the main character from rpg 2.
I prefer to play TPRG2 battles in TRPG2, and playing TSoG battles in TSoG. Stick with new battles.
5) Hidden Treasure Chests.
Hidden Teasure Chest are always fun. They are more fun when they are a challenge to find or open.
6) 'Grandfather' Gamblin Jack who will psy duel you.
I think Jack is dead by now. Also, why would Jack still be in Somnus after the Shadow War? Personally, I don't care for the card games.
7) Bank where you can by Bonds!!! like in rpg 2, make it up to 30 bonds this time. (maybe in Rivanale instead)
*One can buy reconstruction bonds at the Shadowlands National Bond Office
The bonds idea was suggested forever ago.