Develop a CloudFormation template for on-demand launch of EC2 instances, load balancers, and DynamoDB tables, and set up DNS failover for the secondary Region's load balancer.

Prepare a CloudFormation template for EC2 instances and a load balancer, make the DynamoDB table globally accessible, and enable DNS failover to the secondary Region's load balancer.

In the secondary Region, set up an Auto Scaling group and load balancer, ensure the DynamoDB table is globally accessible, and use a CloudWatch alarm to trigger a Lambda function for updating Route 53 to point to the new load balancer.