Attached to the post is an image from something I threw together at work a couple weeks ago in my free time.
I've been a big proponent of doing Avengers 3 in two parts since we saw Thanos the first time on screen. But, because I haven't seen anything legitimate leading to that becoming a reality, I went under the assumption they weren't going to do that.
I also don't know their Netflix series release dates, so I just threw them together for now.
My thought behind what I have there is book-ending the new/risky projects with proven successes. This has Ant Man between AOU and Captain America 3 (which has been confirmed), Doctor Strange between Captain America 3 and Thor 3, and Inhumans between GOTG2 and Avengers 3. Also, this puts more opportunities to touch on the cosmic side with Thanos by having Thor 3, GOTG2 and Inhumans back-to-back-to-back, leading up to Thanos arriving on Earth in Avengers 3.
This plan also has Phase 4 beginning in July 2018 with Iron Man 4 (Ten Rings/Mandarin), Ms. Marvel in November 2018 and Captain America 4, with Bucky as Cap in May 2019.
If they do a two-part Avengers 3, as pr0xyt0xin as also mentioned, I could see them doing:
November 2017 - Ms. Marvel
May 2018 - Avengers 3 Part 1
July 2018 - Inhumans
November 2018 - Avengers 3 Part 2
Two plans, each of which would excite me equally.