Have been thinking about the last two infinity stones that haven't shown up in the MCU, here is the my fan theory
Eye of Aggamotto is the green stone known as the time stone
this will grant the user the ability to travel to other dimensions in time and space
this is the MCUs what if? Slash Back to the future
the Soul stone is what powers Asgards healing chamber, it has been keeping these Gods alive for "give or take 5000 years" it is called a soul forge, and is orange in colour, this is what Jane foster called a "Quantum Field Generator" and it's power is to heal
loki will cause Ragnarok, as he will give the soul stone to thanos, and the gods will die out, having no way to sustain or heal them selves, this is the MCUs subtle stone reveal, being there in every Thor movie
Veterans Day