Just thinking outside the usual merger channels; these ideas came to me while pondering the original 1949 California Zephyr.
Idea No. 1:
Chicago, Burlington & Quincy plus Denver & Rio Grande Western plus Western Pacific, with the proviso that the Great Northern and Northern Pacific (who presumably merge) are sold the CB&Q's Twin Cities-Chicago line to ensure their access to Chicago.
Idea No. 2:
Rock Island plus Missouri Pacific plus Milwaukee Road.
What's the verdict?
Idea No. 1:
Chicago, Burlington & Quincy plus Denver & Rio Grande Western plus Western Pacific, with the proviso that the Great Northern and Northern Pacific (who presumably merge) are sold the CB&Q's Twin Cities-Chicago line to ensure their access to Chicago.
Idea No. 2:
Rock Island plus Missouri Pacific plus Milwaukee Road.
What's the verdict?