u/Calm-Valuable-950

I think as a community we've collectively agreed many times that the game that you decide to make is the crucial part of eventually marketing it. So what can we actually do to not pour 3 years of hard work into a dead idea?

I've been following the market for decades, thinking hard about all this and I still feel clueless when faced with deciding between a few potential ideas for my next game. What are your approaches?