My dear sir,
as you have vlan 100,200,70 and 50

Router1 have vlan 100 and 200
Router2 have vlan 50 and 70
in this case vlan 70 can not communicating with vlan 50  ok !
but your vlan 50 can communicate with your router 2 and when your packet reached on your router2 then make easy routing between your f0/0 and serial 0/0/0. 

and where is, on router 1 have same situation your vlan 100 user can communicate with router1 you just make routering here between your f0/0 and serial 0/0/0..

(And for communication between your vlan in same network (vlan 50 and 70) or (vlan 100 and 200) you can user intervlan)