There are multiple great choices for fully Dragon commanders
The power boost and card draw really capitalize if you can bypass blockers easily
Dovin's Veto | Illustration by Izzy Control cards fall into a few categories: Interaction (including counterspells, spot removal, and board wipes), card draw, and threats
The Non-Wall Imps Maddening Imp, Nettling Imp, and Norritt all have long-winded tap abilities involving non-wall creatures
Nissa, Vital Force looks to be a classic sideboard card for midrange decks, as her plus ability is great at putting pressure on an opponent and the minus is useful in returning another threat from the graveyard
While this would all be well and good, theres currently no indication that Wizards is planning such a product