Can Niko Belic come back for Gta 5?

yes it's possible Niko could return in GTA V, Rockstar games didn't kill him off. it would be hard to continue his story, where do they go from having his girlfriend kill to off his cousin. in the end of his story he finally realizes the American Dream is just that a dream which no-one can ever achieve what he was trying to do in GTA IV was living a impossible dream. like the other person said he can always make a cameo in the other games like he did in the exclusive expansion packs on Xbox 360

He could quite possibly come back for a cameo or as a main character, like how tommy verceti was featured in quite a few. but gta 5 wont happen for a long time seeing how rockstar ( creators ) are investing there time in new and refreshing ideas, the agency and red dead redemption for example.

Yes but he is not playable. In LaD you'll for example meet him at the museum where the diamond deal should take place but you get separated during the ambush (however Jonny remarks on the number of dead bodies Niko left xD). In BoGT you'll meet him at the exchange of Gracy for the diamonds at the sewage plant (or refinery or whatever). Other NPC also have guest appearance, most remarkable Roman Bellic who you have to kidnap in LaD xD

mostly not because ever gta game has a different person