Trailers for "Avengers – Endgame" and "Captain Marvel"

These two trailers hit within the last few days and while I really can't wait to watch "Captain Marvel", the excitement for "Avengers – Endgame" is bitter sweet.
Marvel has built up an amazing franchise starting with the first Iron Man movie. It has spawned an entire universe of movies, TV series, and other media that have entertained me for ten years. I really wonder how they are going to end this chapter with the last Avengers movie and what the next chapter will bring.