I think a lot of the combo decks of this era would fold pretty hard to the standard decks of today, certainly if they could prepare sideboards for them
Ciaran Farah was Canada's No
Thopter Squadron Thopter Squadron is a card thats been full of potential for years
This is very relevant in this deck if you have a Thalia, Guardian of Thraben and Adeline, Resplendent Cathar in play, then it costs just one mana to use
Centering is also hugea card with even borders is much more desirable than an off-center one
Furthermore, there are many more widely played formats (such as Tiny Leaders) I could provide a link to, but the reality is that if you include all those formats in your definition of previously banned, some person will eventually just invent a format that bans every card but basic lands, and therefore will be able to tutor all cards