It would be interesting if they are sent to track down Cortana. 

That's probably overstating things. I'm pretty sure the final outcome(s) of Mass Effect 3 were unaffected by this bug. They wanted ME3 to end the way it did, it's just that the bug forced them to take a detour to get there.

Sounds like 343 might have made a questionable decision in hiring the writer they did. But also if they were subject to corporate interference then that kinda ruins trumps whether or not the writer was really up to the task.

Still this is all the views of an outsider who was only hearing about rthe game from the perspective of someone who played it. So it's hardly an authoritative view on the positives and negatives of the game's story, even if the guy is well connected and a bit of an expert. Still the guy had no idea who the writer for Halo 5 was.

The guy actually knew who the head writer was because of his bad reputation in the videogame/comic industry. 

Sorry, I mean the guy didn't know that this hack was the writer until the youtuber told him. So he had enough insider knowledge to know the writer was a hack, but he lacked the level of insider knowledge to know that this hack was the writer for Halo 5.

Therefore he completely lacked all inside knowledge about the development of Halo 5, and he had no first hand experience of the game itself. So everything he said was total speculation based on a brief second-hand summary of the game. Some of the speculation is pretty reasonable and probably fairly predictable, since we know that corporates interfere in big budget productions across all entertainment segments. So what this guy guesses at has a decent probabilitiy of being 90%+ accurate. But the fact of the matter is the guy does not have any inside knowledge of what went on behind the scenes with Halo 5.

So you guys think Halo 5 is the start to their new trilogy? Did 343 give mention or a hint that Halo 5 is game one of their new trilogy?

Either way, chances are they will continue to make Halo games for years to come so it wouldn't be surprising if they made Halo 7, 8, 9, etc.

I love the Halo universe and Halo 4 has the best story telling of the series. I didn't play Halo 5 yet (still in wrapped case) but from what I'm hearing it's not really a continuation of Halo 4. I don't mind not playing Master Chief but they should've followed what they started in 4.

Also, every publisher has a say in the development of huge franchises they fund so MS being involved in the story is not a surprise. They all do it, would it be good or bad they all do it.

They sorta gave a hint a few months ago http://gamrconnect.vgchartz.com/thread.php?id=208584&page=1

I already assumed this. Bungie isn't working on Halo. Microsoft owns it, right? Bungie went on to Destiny, sadly.

Bungie went to Activision to work on Destiny.