It’s not that just Dr. Banner contemplates – and declines – the prospect of an affair with Natasha, but the Black Widow herself seems quite engaged in this possibility. She’s, in fact the one who makes the first move.

And there’s more. She also appears to take on the role of the Hulk whisperer. So some point, she controls the raging beast, helping him to shift to his human form.

In my opinion, Hulk’s decision to part company with the Avengers is caused by his feelings for the Black Widow. His final gesture must be read as a way to protect Natasha from his bursts. Is that not a way to say “I love you back”, huh?

Anyway, just another apparently loose end they’ll most certainly build on later!

2. Loki’s Scepter revealed as the Mind Gem

This one must have pained some fans. Until Age of Ultron, Loki’s Scepter – also known as the Chitauri Scepter – was not confirmed as an Infinity Stone.

The key argument was Thanos would never part with an Infinity Gem – his goal is to gather all 6 of them and assemble the Infinity Gauntlet in order to rule the world – this one and any other known and unknown world.

Until Age of Ultron, the alien artifact would just be a powerful tool used to manipulate people’s minds.