"Maybe sometimes people just like to praise a famous name"...
Of course Spartans are legendary, but expanded lore and canon has shown us it was, in essence, propaganda at times. Spartans, especially Spartan-II's are not invincible. I think 'Lone Wolf' in Reach shows the futility of it in reality. These are not superheroes. Even though Six was a Spartan-III, he fought the good fight as much as he could. But was overwhelmed. But can we really buy that 4 Spartan-IV, new recruits no less, can drop in with flying phantoms, wraiths on the ground, dozens and dozens of deadly enemies like full armored elites, jackals with snipers, even Covenant cruisers above and come out without breaking a sweat?
Don't get me wrong. Not hating the trailer at all. I think it's amazing and has me insanely pumped for the campaign.
I don't know, maybe this is just something bothering me since Halo 4, I liked the underdog narrative of Halo CE, 2, 3 and Reach. I don't like how the Infinity can traverse the galaxy at will blowing away other ships with nary a care, don't like humans being the galactic superpowers doing what they want at will.
Though I'm definitely over thinking it myself. It's just an amazing cinematic meant to introduce the team, their capabilities, show off the new things like thrust and ground pound, and get people ready for the level.