Samsung has already devoted a lot of time and resources to Tizen, however the nascent operating system still has a long way to go before it can become standard on Samsung's mobile devices and replace Android. The company has already released several devices powered by Tizen, including but not limited to a smartphone, smartwatches, smart cameras and even a TV.
Rumor has it that Samsung Electronics has begun moving software resources that were previously working with Android OS for Galaxy devices over to Tizen. Apparently the move is quite a bit one and may even have resulted in more than 1000 people begin moved over from Android to Tizen. Samsung reportedly has a 5,000 strong team of developers that's tasked with further developing and improving its operating system.
No confirmation has come in from Samsung regarding this move so it would be best to take it with a grain of salt.