not-so-newguy
I'm the Straw Man in your argument
I bought Rise of Heroes. It's a 0 level adventure. I have not used it though
I've bought 5th Edition Foes and have backed Tome of Beasts and I'm waiting eagerly for that one. You can never have too many monsters, and 5th Ed Foes has been very useful so far.
I hope Wizards will also get on the bandwagon and release a Monster Manual 2 or similar product soon!
Nope. No need.
Conversion and improvisation.
40 years of TSR/WotC gaming material already owned that becomes 5E material in a matter of minutes.