(I feel bad translation)
To my taste, almost any nebula is valid, but I understand that area should be close to the bubble.
Quickly I remember I like the area of Orion, with a large number of nebulae of different sizes in a tight pocket but it would take several days:
21 Points of interest until Orion Nebula and its surroundings.
In my map I remain so, but if the route is viable for the game try to reorder the steps (if I am told).
St: Bellatrix / Gamma Orionis / HIP 25336 (B) (70 : -67 : -230) (Green 36)
St: Betelgeuse / Alpha Orionis / HIP 27989 (M) (170 : -73 : -460) (Purple 1)
St: Mintaka / Delta Orionis (O) (270 : -205 : -600) (Purple 2)
Nb: NGC 2392 / Eskimo Nebula (NbPlt) (230 : 239 : -730) (Purple 3)
St: Alnitak / Zeta Orionis (O) (320 : -204 : -630) (Purple 4)
St: Meissa / Lambda Orionis / HIP 26207 (O) (290 : -217 : -1040) (Purple 5)
Nb: IC 2118 / Witch Head Nebula (370 : -402 : -720) (Purple 6)
St: HD 35411 / Eta Orionis (B) (360 : -306 : -770) (Purple 7)
St: Saiph / K Orionis (B) (350 : -200 : -500) (Purple 8)
St: Rigel / Beta Orionis (B) (390 : -361 : -680) (Purple 9)
Nb: NGC 1360 (NbPlt) (440 : -926 : -510) (Purple 10)
Nb: IC 418 / Spirograph Nebula (NbPlt) (580 : -453 : -820) (Purple 11)
Nb: NGC 1999 (550 : -375 : -930) (Purple 12)
Nb: NGC 2068 / Messier 78 (540 : -322 : -1.140) (Purple 13)
Nb: Orion Nebula (590 : -432 : -1070) (Purple 14)
and
Nb: NGC 1977 / Running Man Nebula (580 : -426 : -1080) (Purple 15)
Nb: Horsehead Dark Region (NbPlt) (610 : -405 : -1190) (Purple 16)
and
Nb: Flame Nebula (NbPlt) (630 : -403 : -1200) (Purple 17)
Nb: Horsehead Nebula (650 : -432 : -1280) (Purple 18)
Nb: Barnard's Loop (630 : -426 : -1230) (Purple 19)
Nb: Orion Dark Region (600 : -312 : -1340) (Purple 20)
a greeting
Cmdr: SKafre