It more than likely won't, we already have Ash and Pikachu and to create another anime is quite expensive.
And if they ditch Ash and Pikachu a lot of viewers will lose interest.
Besides they're target audience is for young children despite inadvertently catering for older people as well. So even if they did create a more mature style anime it would still be targeted at younger children hence ruining its purpose.
Oh well I guess we're stuck with our imagination..