Juryo opponents faced by maegashira by relative position since 2004 (57 basho), number in brackets = matches in the final 5 days = likely scheduled because the maegashira is headed for makekoshi:
bottom maegashira rank: 123 (51)
2nd from bottom: 101 (42)
3rd from bottom: 102 (47)
4th from bottom: 84 (41)
5th from bottom: 52 (35)
6th from bottom: 46 (28)
7th from bottom: 43 (35)
8th from bottom: 32 (23)
9th from bottom: 12 (12)
10th from bottom: 14 (14)
So, once you move beyond the bottom 4 to 6 spots, maegashira mostly receive juryo opponents for exchange purposes at the end of the basho. Endo should be ranked 8th or better...assuming he'll get slotted in 8th (= M13e), he's on track for about half a juryo opponent next basho, and he'll likely only get that matchup if he's in demotion danger. You be the judge how probable that is.
In case anybody finds my "last 5 days" choice questionable - maegashira-juryo matchups by day since 2004:
Day 1: 22
Day 2: 23
Day 3: 27
Day 4: 25
Day 5: 28
Day 6: 30
Day 7: 35
Day 8: 25
Day 9: 31
Day 10: 35
Day 11: 49
Day 12: 60
Day 13: 57
Day 14: 74
Day 15: 95