Are these graphics cards good for next year's gaming?

Nvidia gtx 750 ti and non ti/gtx 760 ti and non ti/ 770 ti and non ti? (with 2 gb)
Radeon r9 270x/270
radeon 280x/280
NVidia gtx 650 ti/660/

I'm planning to build a pc next year the games that I want to play on these graphics cards when I build my computer is minecraft and titanfall and also the newer next year's games… I don't mind playing on medium or low settings on the next year's newer games…

Added (1). How about the other cards?

Since you don't mind low/medium settings. Even the 750 TI will suit your needs.
The 750 TI runs Titanfall better than the Xbox One according to Gamespot.com and Game-Debate.com.

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The 750 or 750 Ti would run stuff at medium-ish at 1920x1080, low on higher end games like Crysis 3.

I don't recall a 760 or 770 Ti but the 760 and 770 will run most games at high settings.

The R9 260X is roughly close to a 750 Ti, the R9 270X is similar to a 760, and the R9 280X is pretty much on par with a 770.

If you've got the cash I would spring for a 770 or 280X. They're so close in speed it comes down to personal preference which one you buy.