Does anyone thinks that there will b new species of animals in the future?

Hundreds of new species are discovered every year.  

Technically we are a single species but adapted to different environments, of course there will be new species in the future, life is being created anywhere in the universe and also animal species are constantly evolving according to their environment.

An example, if there are two trees of the same species and the two are separated, one in cold climate and the other in its same habitat, one will adapt to the sudden change in temperature or simply die, each species with small mutations after a long time. come back better and better, after some collapse, there is only one option, the law of the strongest.

Yes. Always improving, evolving, changing lifeforms. 

Hundreds of new species are discovered every year.  

Of course. There has even been a new species within very recent (in geological terms) times. The London Underground Mosquito. It is found nowhere but in the London underground (subway), which did not even exist until a century of so ago.

If you broaden your question to "Will we discover new species in the future?", the answer is a resounding yes. I remember one parasitology lab that considered the finding, describing, and naming of five new species and a new genus to be a "slow day".

Yes, because animals tend to evolve when subjected with sudden change in their environment. They adapt in order to survive. So for example, there are two groups anole lizard of similar species with long legs who lives in a tree. If you take one group or simply just a pairing mate isolated in an island and placed them in bushes and twigs, the new generation of those lizard would evolve with shorter legs because they adapted on the ground. So if you take that same group of isolated anole lizards to the other group, they won't mate because they're not different species, it's just that the isolates one was a new evolved one out of the recent species they belong to.