Back when HL came out I had a buddy whom was a real life Army Ranger ( with thirteen missions on his coin) . He thought video games were for , " geeks and eggheads " .
I dragged my game machine to his house and forced him play a bit of it ....several days and almost no sleep later , he came to me and said, " that was fucking AMAZING, i want to play more games like that , show me more games like that...",
and I had to hit him with that horrible gut punch ," sorry man , that's all she wrote, there aren't any other games like that ".
If you go back and play HL ( or better yet the awesome 'Black Mesa' ) and then play HL2, you will notice the trouble inherent in creative success when you jump to ep1, ep2. It's hard to remember what was the lightning and what was the lightning rod back in the beginning that forged the HL goodness.
I mean HL was based on the supposedly 'true' story of a guy claiming to be a guard ( where the idea of Barney came from ) that escaped the secret Dulce military base in New mexico . True or not some damn fine source material to work with .
In HL2 they basically explord the logical aftermath implications of the first game and added some cool bits ( mostly borrowed from other obscure places like: the gravity gun; "inspired" entirely by how the character in the game Trespasser handled objects ).
But in ep1&2 the original magic is gone, some of the levels were mind numbingly bad ( like, how many hours do I have to play in poorly lit or totally dark jump scare tunnels, or the "someone got CS:GO in my Half-life" style levels where you had no way of not being at a tactical dis-advantage as you criss-cross the same landscape again and again ).
So in Newell's case he has to say nothing. If the magic is dead and lightning cannot strike the HL franchise a third time , then he needs to keep millions of raving fanboys at home polishing their homemade gravity guns , and not say, storming his castle ( or constantly hacking steam servers ) and burning all his stuff down. Alternatively if , by some magic they were producing another lightning infused HL game ( and not just something grossly self-indulgent ) how could he possibly say anything that could be squeezed between HL3's expectations and the hype ceiling that already exists?
Perhaps he should just sell the rights to HL3 to TakeTwo or rockstar It would be interesting to see what they could do with it