It did seemed like Sam was telling Dean "Let's go old school Season 1 - 3 types of tactics with this threat" in the hospital
Hopefully Michael and Lucifer will make a return and Crowley make it happen cause he needs all the help against Rowena that he can get and he needs the heavy hitters... but with the mark being no more what will Lucifer's mind set be now?
As for the 2 angels that has Castiel I'm calling it now and I'll put it in a spoiler....
Those two work for Metatron and they are taking Cas to him
How find out bout that spoiler breh