You could read the existing views with javascript (JSOM) to retrieve all the existing views on the specified list.
In the OnQuerySucceed
function while looping through the views you could generate a button and add it the DOM. For example in your content editor add a element and push the buttons in their.
var viewCollection = null;
function runCode() {
var clientContext = new SP.ClientContext.get_current();
if (clientContext != undefined && clientContext != null) {
var web = clientContext.get_web();
var listCollection = web.get_lists();
var list = listCollection.getByTitle("Tasks");
this.viewCollection = list.get_views();
var viewInfo = new SP.ViewCreationInformation();
viewInfo.set_title('MyView');
this.viewCollection.add(viewInfo);
clientContext.load(this.viewCollection);
clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceeded), Function.createDelegate(this, this.onQueryFailed));
}
}
function onQuerySucceeded() {
var viewInfo = 'Tasks list current views: \n\n';
var viewEnumerator = this.viewCollection.getEnumerator();
while (viewEnumerator.moveNext()) {
var view = viewEnumerator.get_current();
viewInfo += view.get_title() + '\n';
}
alert(viewInfo);
}
function onQueryFailed(sender, args) {
alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
}