Well, I know Pokémon will never stop to be a series mainly aimed for kids, but lately their stuff seem to be taking quite the step-up. The latest games do have stuff happening that are quite incredible to see considering the series. I won't speak much due to spoilers
and I forgot what text command was it to hide it behind a black surface, but they certainly know how to deliver stuff like that.
Now, as for Pokémon Conquest, well, as I mention before, it's a game I'd very much like to play. And not only because it's a crossover of two things I like. The Sengoku period has been something of my interest lately, partly thanks to Samurai Warriors, which is where the character designs are taken from, despite the crossover being with Nobunaga's Amibiton, go figure.
Though curiously, sale reports in Japan stated that it was actually adults and older teenagers who made the bulk of the initial sales. I find it a bit amusing, heh.
I wouldn't mind seeing this spin-off to become it's own sub-series. Though with the plot and setting, using the Sengoku period again may prove hard to do. On the other hand, they wouldn't need to be connected by plot, and since this is basically the people of the Sengoku period in a fictional setting, they can get away with is and still have space to expand upon the potential, with a new plot and stuff. Or heck, actually make a game to happen in actual Japan with it's story.
And also, they have other sources to make a game with. Like one based on the Romance of the Three Kingdoms period, and then pull a Warriors Orichi.
Hmm, the possibilities...