It's not like I don't want players to be confident, it's just the simple fact that you haven't even play a single game yet that mattered. 70 wins is plausible only with an almost perfect season by a very well constructed team these days. There are really only two, maybe three teams I'd even think about saying that about.
Rasheed Wallace said the Celtics could do it and TNT broadcaster and former player Reggie Miller said the Lakers could do it. Is it possible that LA and Boston could have injury free seasons? Yes, but I seriously doubt it. Additionally, the new additions on these teams look good on paper, but haven't meshed completely yet.
Some teams that look great or better on paper could actually end up being worse. Allow some time for evaluation before you make such a bold prediction.
Does a great regular season mean anything? Besides homecourt in the playoffs and maybe something for commentators to point out? It doesn't put a championship ring on your finger and it doesn't raise a banner to the rafters. Set goals for the second season before you set goals for the first season.