ETH hac no chance to increase again back because they are converting to ETC so better to dont expect to by ethereum..
Instead by ETC

Vitalik said he will be 100% with ETH. So I think there is very small chance for the ETC to succeed.

I also saw many developers and corporations will be with the ETH. But it is possible the same service can be used by ETC.

That is right. So if the ETC is not supported by many developers, it is just another pump and dump scam coin.

In the short term, the ETC price is more affected by the intention of the hacker. If he does not support it, the price will crash.

We do not know the intention of the owners of the DAO, around 11 million in total. They might sell them all.

The white hat hackers have already stated that they will return the ETC. They have supports from some lawyers.

There is no time scale that when they will return the ETC. After the price of ETC is crashed, there is no good benefit for the DAO holders.