Ajani is going around Theros dissing Heliod.
Anyway, about Snapcaster Mage, I believe Maro mentioned on his blog at some point that they may make a red version of it in the future, but it won't be as powerful and it probably won't have flash. Wizards tends to handle this sort of thing by making a card that costs more but has some benefit, though one that doesn't match the original. I think some variations they could do are:
Red Snapcaster 1 - 2R
Creature - Human Shaman
When Red Snapcaster 1 enters the battlefield, add RR to your mana pool and target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)
2/2
Red Snapcaster 2 - 1R
Creature - Human Shaman
As an additional cost, discard a card.
When Red Snapcaster 2 enters the battlefield, draw a card and target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)
2/1
Red Snapcaster 3 - 2R
Creature - Human Shaman
When Red Snapcaster 3 enters the battlefield, up to two target instant or sorcery card in your graveyard gain flashback until end of turn. The flashback cost are equal to their mana costs. (You may cast those cards from your graveyard for their flashback cost. Then exile it.)
2/2
Or maybe
Red Snapcaster 4 - 1R
Creature - Human Shaman
When Red Snapcaster 4 enters the battlefield, exile a card from your graveyard. You may play it this turn.
2/1
Though that one seems potentially dangerous.
EDIT: Come to think of it, even just restricting it to instant and sorceries may make it sufficiently different and "better", since the card goes right back into the graveyard if it is cast.
EDIT 2: Come to think of it...
Red Snapcaster 5 - 1R
Creature - Human Shaman
When Red Snapcaster 5 enters the battlefield, exile an instant or sorcery card from each player's graveyard. Until end of turn, you may play cards exiled this way.
2/1
This seems exactly like what Wizards would do. The extra cards being given "flashback" don't actually benefit you that much, since you probably can't cast them, but it feels like it
could be more powerful.