Arupa_Loka-gap-Nivana

Question:

What exist between Arupa Loka & Nivana?

http://uk.answers.yahoo.com/question/index;_ylt=AkLT0L_n.y1BIZkWUO561vIhBgx.;_ylv=3?qid=20121108040551AAoZxhz

Refer to 31 Planes of Existence
http://www.energyenhancement.org/31-Planes-of-Existence-Chakras-External-to-Body.jpg

Development towards Nirvana is as follows:
1. Sensuous World (kama-loka)
2. Fine-Material World (rupa-loka)
3. Immaterial World (arupa-loka)

The final status at Arupa loka is:
(31) Neither-perception-nor-non-perception (nevasaññanasaññayatanupaga deva)
It is not Nirvana.

So, what exists between Arupa Loka & Nirvana?
(If Arupa Loka is not Nirvana, there should be something in the gap between them.)
Any ideas from Tipitaka?


Answer: