The Ending We Needed, but never wanted!

Rating: 10/10 (30 April 2019)

Yes this review contains spoilers and theories, as well as my review on this epic film!
So for starters, I saw the film on Sunday during it's opening weekend and I wanted to stay on social media and refused to click any link about Endgame as I did not want any spoilers, but after seeing it, all I want to do it talk about it, share idea and theories, and quote some of the best one liners in cinematic history.
So, yes I gave this film a 10/10 and I would rate it higher if given the possibility. The story was amazing, and the trailer even though it told us about the Quantum Realm and that was going to be the focus of the film; the Russo brothers added many twists and definitely unforseen endings to our beloved superheroes.
The one thing everybody was bashing the movie for was the end credits, or lack there of... However, Marvel end credits usually have been added as little last minute jokes and laughs, or leading into the next film. However, this film marks the end of Phase 3, so there is nothing to lead into and the film was over 3 hours long, so do you really need a little 15 second segment showing the group eating Shawarma?
One ending that wasn't addressed and makes sense with the announcement of it's release on Disney+ was the disappearance of Loki after Tony, Steve, and Bruce travel back to 2012 to retrieve the Tesseract. However, after the foiled attempt, Loki manages to escape with the Tesseract. However, the group travels further in time to retrieve the Tesseract from the facility where Captain America was created. So my question is, if they retrieved the Tesseract earlier than 2012, does that mean the one Loki has is gone? Or did it create a ripple in the timeline as the Ancient One explained to Professor Hulk. I guess we will have to wait for that theory when Loki gets his show when Disney+ premieres.
And finally, the end credits didn't have any videos but there was an audio snippet of what sounded like metal clashing on metal, almost like a forge or blacksmithing. So, many people are speculating that this is Iron Man making his Mach.1 suit in the cave. Kind of like a statement, ending where it began.
But my theory is it's Eitri... The Giant Dwarf of Nidavellir. I believe it is him forging a weapon which would lead us into GotG: vol.3, which is why Marvel was so set of getting James Gunn back to direct as he had the plot and the story already wrote before his firing and while Endgame was being produced. At the end of GotG: vol.2 we get introduced to Adam Warlock, who, James Gunn, said wouldn't appear in Endgame, but his presence will be known in the MCU... Next major villian perhaps? Could he be forcing Eitri to make him a weapon more powerful than the Infinity Gauntlet? Perhaps not to harness all the stones, but perhaps to harness just one (Soul Stone, which he aquires in the comics after obtaining the Infinity Gauntlet) but make it even more powerful? The soul stone was barely used in Infinity War and Endgame, but it's considered the most powerful stone, so creating a villian that showcased such power might bring the Orange gem justice.
That's my review and my theories.
Thanks