nowhere did it say in the spoilers that its Obito. It didnt even hint it unless Obito was the only Uchiha in the village at that time, not mention Tobi was an adult while he was stylin on the 4th/controlling the 9tails. Im also pretty sure Kakashi didnt get his namesake immediately after obtaining the sharingan.
You are right nowhere did it say it thats y i said its LOOKING MORE LIKE OBITO
not it is OBITO
for all we know he could throw a twist and be Obito brother or uncle some shyt like that