Yes, no one site can take the place of bitcointalk forum as no one will be able to gather so many users. Previously Cryptotalk forum tried to gain traffic by monetizing every post but that model failed too.
There are many site that has tried to function as bitcointalk forum but couldn't make it and they have low traffic, even as that bitcointalk has remained the number one forum that convey more information about bitcoin with highest volume of visitor everyday by days. Even those site who tried to copy bitcointalk failed and fall out of competition.
Well, if anyone wants to try he is allowed to make a similar forum like bitcointalk but he should be realistic in his approach as to what are his competitors and how much time would it take to reach to a certain level. Even it is difficult to reach the altcoinstalks forum level, thinking of competing with bitcointalk is out of the question.
Usually, many users seek partners for their project with a vision that the partner will also invest in the project but it is a fact that OP won't get partners to invest with him unless he has some significant success in his project/forum.