We're constantly being told the narrative that launching new IP is too risky, and this is why publishers keep launching sequels.
But there are a ton of examples of new IP doing absolute gangbusters:
Watch Dogs is the current example, but also:
Assassin's Creed, Halo, God of War, Gears of War, Bioshock, Dragon Age
The first games in those series were big hits in their time, to name a few. If the game looks good, people tend to get hyped about it.