If you were just acquihired and no one high up in the BIGCOMPANY is taking an active interest in you. LEAVE. You are cannon fodder. The sooner you realize that

If you were just acquihired and no one high up in the BIGCOMPANY is taking an active interest in you. LEAVE. You are cannon fodder. The sooner you realize that the better off you will be. If you are contractually tied to the job, plan your exit NOW and leave the first day you can. Look around and see where your former leaders are now? Are they gone or in positions of power? If no BIGCORP employees are reporting to them then you know the writing is on the wall. Leave.